Why does MATLAB hang or generate an error when I try to run mex -setup or mbuild -setup?

When I run "mex -setup" or "mbuild -setup" I receive an error such as

 mex.bat: internal error in sub get_compiler_info(): don't recognize <string>

or

 mbuild.bat: internal error in sub get_compiler_info(): don't recognize <string>

or, I do not get an error, but MATLAB just hangs.

Answer 1

[MathWorks Support Team]

These errors are due to a conflict between MATLAB and your antivirus software. Although the problem may not be limited to these products, we have reproduced this problem in house with the Cheyenne AntiVirus and Dr. Solomon virus checkers.

To work around this conflict, temporarily disable the virus checker when running "mex -setup" or "mbuild -setup" and reboot. After you have successfully run the setup operation, you can re-enable your antivirus software.